Improvement in sewing-machines



L. LYON. Sewing-Machine Patented on. n, 1875.

N0.LI68,757.

N. PEI'ERS. FHOTO-LITHOQRAPHER. WASHINGTON. D c,

cam STATES mum.

LnoIUs LYON, OFiNEW Y-ORK, N.- Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No- 168,'757, dated October11, 1875; application filed I April 13, 1874.

To all whom it may concern Be it known that I, LUcIUs LYON, of the city,county, and State of New York, have invented certain Improvements inSewing- Machines, of which the following is a specification:

This invention relates to a certain combination of devices forregulating the throw of the feed-dog of sewing-machines for the purposeof regulating the length of the stitches; and it consists in thecombination, with the rockshaft which carries the arm which operates thefeed-dog, of a slotted lever carrying an adjustable slide, which may beshifted as desired by means of a set-screw, said slide being pivoted tothe lower end of a rod connected to" an eccentric on the main shaft ofthe machine, by means of which the proper motion is imparted to therock-shaft. By setting the slide away from or toward the rock-shaft itwill be moved a greater or less extent at each rotation of the mainshaft, thus increasing or diminishing the throw of the feed-dog andregulating the length of the stitches. The slide is adjusted by simplyturning the set-screw in either direction, as may be desired.

In machines as hitherto constructed-the slide has been made adjustablein the slotted crank by means of a binding-nut at one side. By suchconstruction the use of a wrench is necessitated, and, in order to shiftthe slide, the nut has to be loosened and the slide 7 shifted to properposition by hand, after which the nut is again tightened. The presentinvention is designed to obviate the "inconvenience attendant upon this.method of shifting the slide, and provide a device by means of whichthe slide may be shifted and fastened at one operation.

In the accompanying drawing, Figure 1 represents a sectional side viewof this invention, and Fig. 2 is a longitudinal vertical section of theshuttle-race, showing the shuttledriving mechanism.

I In the drawing, the letter A designates the cloth-plate of thesewing-machine, from which rises the standard B, that forms the bearingfor the driving-shaft O, and to the face of which are secured theneedle-slide and the .the breast of the shuttle-race.

presser-slide in the ordinary manner. To the under surface of thiscloth-plate is cast, or otherwise attached, a flange, D, which forms Theshuttle S is supported in a cradle, E, formed between two arms, a a, ofa bifurcated lever, F, by two wires, 1) b, which are secured in the endsof said arms in the proper position to form a support for the shuttle.The arm a is hollowed out to admit the point of the shuttle, and on thearm a is pivoted a button, 0, which can be turned back, so as to allowof introducing or removing the shuttle. The lever F is secured by aset-screw, d, to the end of a rock-shaft, e, which has its bearings inlugs f projecting from the under surface of the cloth-plate, and whichconnects by a crank, g, and rod h with an eccentric, c, mounted on thedriving-shaft. By adjusting the lever F the motion of the shuttle can bebrought in the proper relation toward the motion of the needle, and bythe action of the eccentric and crank the mechanism for driving theshuttle is rendered noiseless, and my machine can be driven with greatspeed without danger of dropping stitches or of producing a disagreeablenoise. l

.On the driving-shaft O is mounted an eccentric, k, which connects by arod, 1, with a slide, m, which is fitted in a slot, 0, constructed in acrank, p, (see Fig. 2,) the said slide being adjustable in said slot bya thumbscrew, g, which passes through the crank and the slide, asclearly represented. The crank p is mounted on one end of a rock-shaft,1',

tion, merely requiring a turn of the set-screw to move the slide.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The combination, with the rock-shaft 1", provided at one'end. with anarm, t, for operating This specificzgtion' signed by me this 31st thefeed-dogof a sewing-machinehof the addayof March, 1874. l 'ustablerod..leccentric k slotte crank 1), adjustable slie m, the set-screw q,passing LUOIUS O through the crank p, and slide m, for moving Witnesses:the latter back and forth, as and for the pur- W. HAUFF, pose described.

E. F. KASTENHUBER.

